import requests
from bs4 import BeautifulSoup

url = "https://books.toscrape.com/"
r = requests.get(url)
html = r.content
soup = BeautifulSoup(html, 'html.parser')


category = "travel"

catego_info = []
catego_dict = {}
# get category and URL from side div and put them as a list [catego, url] in a list

def get_category_list(soup):
    catego_info = []
    catego_dict = {}
    for li in soup.find("div", class_="side_categories").find_all("li"):
        catego_info.append([li.a.get_text(strip = True).lower(), url + li.a.get('href')])
        catego_dict[li.a.get_text(strip = True).lower()] = url + li.a.get('href')
    return catego_dict


page_url = get_category_list(soup)['travel']
soup2 = BeautifulSoup(requests.get(page_url).content, "html.parser")

def get_product_list(soup):
    list = []
    for i in soup.find_all("article"):
        relative_url = i.h3.a.get('href')
        product_url = url + relative_url.split('../')[-1]
        list.append(product_url)
    return(list)

print(len(get_product_list(soup2)))